My only experience with a reholdering went pretty swimmingly
(as there was no slab damage to contend with). Bought a
1973 Topps #615 Mike Schmidt RC that was graded a PSA 8 PD, but there was obviously a stain on it and
NOT a print defect. I wanted it rectified so Schmitty wouldn't be living a lie inside of his plastic prison. After a bunch of back and forths, they switched out the PD slab to properly make it an ST
(at no charge and shipped both ways on their dime). I got the feeling they wanted it quickly corrected to forever remove this blatant error from their resume.
1973schmidtrc615PSA8PD:STbeforeafter.jpg